HAWTHORNE, Calif. -- NASA astronaut Rex Walheim checks out the Dragon spacecraft under development by Space Exploration Technologies SpaceX of Hawthorne, Calif., for the agency's Commercial Crew Program. In 2011, NASA selected SpaceX during Commercial Crew Development Round 2 CCDev2) activities to mature the design and development of a crew transportation system with the overall goal of accelerating a United States-led capability to the International Space Station. The goal of CCP is to drive down the cost of space travel as well as open up space to more people than ever before by balancing industry’s own innovative capabilities with NASA's 50 years of human spaceflight experience. Six other aerospace companies also are maturing launch vehicle and spacecraft designs under CCDev2, including Alliant Techsystems Inc. ATK, The Boeing Co., Excalibur Almaz Inc., Blue Origin, Sierra Nevada, and United Launch Alliance ULA. For more information, visit www.nasa.gov/commercialcrew. Image credit: Space Exploration Technologies
JSC2003-E-47248 (13 June 2003) --- Astronaut Rex J. Walheim, mission specialist.
Astronaut Rex Walheim spoke at the USA Science and Engineering Festival on April 25, 2014 at the NASA Stage. The festival was open to the public on April 26 and 27, 2014 and was held at the Washington Convention Center in Washington, DC. Photo Credit: (NASA/Aubrey Gemignani)
Astronaut Rex Walheim spoke at the USA Science and Engineering Festival on April 25, 2014 at the NASA Stage. The festival was open to the public on April 26 and 27, 2014 and was held at the Washington Convention Center in Washington, DC. Photo Credit: (NASA/Aubrey Gemignani)
Astronaut Rex Walheim spoke at the USA Science and Engineering Festival on April 25, 2014. The festival was open to the public on April 26 and 27, 2014 and was held at the Washington Convention Center in Washington, DC. Photo Credit: (NASA/Aubrey Gemignani)
JSC2011-E-026871 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026863 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026867 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026887 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026869 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026880 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026866 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026896 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026902 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026868 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026864 (11 March 2011) --- NASA astronaut Rex Walheim (right), STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026878 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026879 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026862 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026872 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-026885 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JOHNSON SPACE CENTER, Houston -- JSC2003-E-47248 -- Astronaut Rex J. Walheim, mission specialist
JSC2011-E-036274 (11 Feb. 2011) --- NASA astronaut Rex Walheim, mission specialist. Photo credit: NASA
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
S122-E-008923 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, performs work on the outside of the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity with Walheim.
S122-E-008727 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, closes one eye while focusing on an extravehicular activity task with the other. Astronaut Stanley Love (out of frame), mission specialist, shared this final spacewalk for the STS-122 Atlantis crew with Walheim.
S122-E-008950 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, works on the new Columbus laboratory's exterior during the STS-122 Atlantis crew's final scheduled spacewalk. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008954 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, works on the new Columbus laboratory's exterior during the STS-122 Atlantis crew's final scheduled spacewalk. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008764 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008922 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, performs work on the outside of the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity with Walheim.
ISS016-E-029500 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008796 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, uses a power tool while installing a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008916 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, performs work on the outside of the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity with Walheim.
S122-E-008781 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
NASA’s Administrator, Charles Bolden (left), President/CEO of Lockheed Martin, Marillyn Hewson (right), and astronaut Rex Walheim (back row) pose for a group photo with the winning high school team in the Exploration Design Challenge. Team ARES from the Governors School for Science and Technology in Hampton, Va. won the challenge with their radiation shield design, which will be built and flown aboard the Orion/EFT-1. The award was announced at the USA Science and Engineering Festival on April 25, 2014 at the Washington Convention Center. Photo Credit: (NASA/Aubrey Gemignani)
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim talks with students. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim signs autographs for students. Part of Batch image transfer from Flickr.
NASA astronaut Rex Walheim is lowered into the water to train for spacewalk in the Neutral Buoyancy Laboratory (NBL) on Tuesday, March 22, 2011, in Houston. ( NASA Photo / Houston Chronicle, Smiley N. Pool )
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim is photographed with event participant. Part of Batch image transfer from Flickr.
At NASA's Kennedy Space Center in Florida, NASA leaders spoke to social media participants as the Orion spacecraft and its Delta IV Heavy rocket were being prepared for launch. Speakers included NASA astronaut Rex Walheim.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks from podium. Part of Batch image transfer from Flickr.
S122-E-009541 (16 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, is pictured on the middeck of Space Shuttle Atlantis while docked with the International Space Station.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks from podium. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim is photographed with students. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim is photographed with students. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim poses for photo with students. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks to students. Part of Batch image transfer from Flickr.
JOHNSON SPACE CENTER, Houston, Texas --- JSC2011-E-036274 --- NASA astronaut Rex Walheim, mission specialist. Photo credit: NASA or National Aeronautics and Space Administration
JSC2002-E-14073 (20 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, speaks from the lectern in Hangar 990 at Ellington Field during the crew return ceremonies.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim talks with students. Part of Batch image transfer from Flickr.
ISS004-E-10100 (16 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, looks out a window in the Zvezda Service Module on the International Space Station (ISS).
STS110-E-5006 (8 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, works on the mid deck of the Space Shuttle Atlantis. The image was taken with at digital still camera.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim talks with students. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim poses for photo with students. Part of Batch image transfer from Flickr.
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks to students. Part of Batch image transfer from Flickr.
S122-E-009101 (15 Feb. 2008) --- Astronaut Alan Poindexter, STS-122 pilot, inspects the gloves of astronaut Rex Walheim, mission specialist, following the ingress of astronauts Walheim and Stanley Love (partially out of frame at left) following the final space walk of a busy week. Astronaut Peggy Whitson, the International Space Station's Expedition 16 commander, checks Love's gloves.
ISS016-E-029502 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, holds onto a handrail and spreads his arms at the Columbus laboratory, the newest piece of hardware on the International Space Station. On this the final spacewalk for the STS-122 Atlantis crew, Walheim's pose is reminiscent of that of a musical conductor who has just completed leading a successful concert. Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008288 (13 Feb. 2008) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, are pictured in the Quest Airlock of the International Space Station as the mission's second spacewalk draws to a close. NASA astronaut Steve Frick, commander, assisted Schlegel and Walheim.
S122-E-009094 (15 Feb. 2008) --- Commanders of the STS-122 Atlantis crew and the International Space Station's expedition, respectively, astronauts Steve Frick and Peggy Whitson, assist astronaut Rex Walheim as he ingresses the station following the third and final extravehicular activity during a week in which the Atlantis was docked to the orbital outpost. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
S122-E-008118 (13 Feb. 2008) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, prepare for the mission's second session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station while Space Shuttle Atlantis is docked with the station. NASA astronaut Steve Frick, commander, assisted Schlegel and Walheim.
Astronaut Rex Walheim (center) speaks to members of the Mississippi House of Representatives in chambers during NASA Day at the Capitol in Jackson on Feb. 19. Walheim was joined at the podium by members of the Mississippi House of Representatives Gulf Coast delegation, as well as Stennis Space Center Director Gene Goldman (astronaut's immediate right) and NASA's Shared Services Center Director Rick Arbuthnot and Partners for Stennis Executive Director Tish Williams (astronaut's immediate left).
S122-E-008297 (13 Feb. 2008) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, are pictured in the Quest Airlock of the International Space Station as the mission's second spacewalk draws to a close. NASA astronaut Peggy Whitson, Expedition 16 commander, assisted Schlegel and Walheim.
S122-E-009076 (15 Feb. 2008) --- Astronaut Stanley Love, mission specialist, works on the new Columbus laboratory's exterior during the STS-122 Atlantis crew's final scheduled spacewalk. Astronaut Rex Walheim (out of frame), mission specialist, shared this extravehicular activity with Love.
ISS004-E-9986 (10 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, stands near an Extravehicular Mobility Unit (EMU) space suit in the Quest Airlock on the International Space Station (ISS). Astronaut Carl E. Walz, Expedition Four flight engineer, is visible in the background.
ISS016-E-028885 (9 Feb. 2008) --- NASA astronaut Rex Walheim (left) and European Space Agency (ESA) astronaut Hans Schlegel, both STS-122 mission specialists, work with Extravehicular Mobility Unit (EMU) spacesuits in the Quest Airlock of the International Space Station while Space Shuttle Atlantis is docked with the station.
S135-E-007118 (10 July 2011) ? NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured at controls on the flight deck of the space shuttle Atlantis during rendezvous and docking operations with the International Space Station. NASA astronaut Rex Walheim, mission specialist, is at right. Photo credit: NASA
S122-E-008200 (13 Feb. 2008) --- European Space Agency (ESA) astronaut Hans Schlegel (top) and NASA astronaut Rex Walheim, both STS-122 mission specialists, participate in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and Schlegel worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
S122-E-008913 (15 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station. In his helmet visor is mirrored the forward section of the Space Shuttle Atlantis, to which the station is docked. Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity (EVA) with Walheim.
S122-E-008323 (13 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, participates in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and European Space Agency (ESA) astronaut Hans Schlegel (out of frame), mission specialist, worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
JSC2007-E-21201 (1 May 2007) --- Astronaut Rex J. Walheim (left) and European Space Agency (ESA) astronaut Hans Schlegel, STS-122 mission specialists, enjoy a light moment as they await the start of an emergency egress training session in the Space Vehicle Mockup Facility at Johnson Space Center. Walheim and Schlegel are wearing training versions of their shuttle launch and entry suits.
S122-E-008187 (13 Feb. 2008) --- European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, participate in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and Schlegel worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
S122-E-008199 (13 Feb. 2008) --- European Space Agency (ESA) astronaut Hans Schlegel (right) and NASA astronaut Rex Walheim, both STS-122 mission specialists, participate in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and Schlegel worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
S122-E-008395 (13 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, participates in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and European Space Agency (ESA) astronaut Hans Schlegel (out of frame), mission specialist, worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
The Orion crew module pressure vessel for Exploration Flight Test-1 (EFT-1) is unveiled at a ceremony at the Operations and Checkout (O&C) Building at NASA’s Kennedy Space Center in Florida on July 2, 2012. Astronaut Rex Walheim poses for photo. Part of Batch image transfer from Flickr.
JSC2011-E-021727 (25 Feb. 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in a training session in a space station mock-up in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
JSC2011-E-043692 (29 April 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, signs his name on hardware during an ingress/egress timeline training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA
S135-E-006280 (9 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured on the middeck of the space shuttle Atlantis during the mission's second day of activities in Earth orbit. Photo credit: NASA
S135-E-007160 (10 July 2011) –-- NASA astronauts Chris Ferguson (left), STS-135 commander, and Rex Walheim, mission specialist, are pictured on the aft flight deck of the space shuttle Atlantis prior to docking with the International Space Station during the mission’s third day in space. Photo credit: NASA
S135-E-007434 (11 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured in the U.S. lab or Destiny on the International Space Station during the fourth day in space for the Atlantis crew and the second day during which the two spacecraft are docked in Earth orbit. Photo credit: NASA
S135-E-007457 (11 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured on the flight deck of the space shuttle Atlantis during the mission's fourth day of activities in Earth orbit and second day while being docked with the International Space Station. Photo credit: NASA
NASA astronaut Rex Walheim undergoes a fit check of his Sokol space suit at the Zvezda facility on Monday, March 28, 2011, in Moscow. The crew of the final shuttle mission traveled to Moscow for a suit fit check of their Russian Soyuz suits that will be required in the event of an emergency. ( NASA Photo / Houston Chronicle, Smiley N. Pool )
JSC2011-E-040211 (10 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, prepares to train in the Neutral Buoyancy Laboratory (NBL) near NASA?s Johnson Space Center in Houston March 10, 2011. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool
JSC2008-E-014907 (21 Feb. 2008) --- Johnson Space Center's (JSC) director Michael L. Coats (right) greets astronauts Rex Walheim (left) and Leland Melvin, STS-122 mission specialists, at Ellington Field near JSC prior to the STS-122 crew return ceremonies.
S122-E-007664 (10 Feb. 2008) --- Astronauts Peggy Whitson, Expedition 16 commander; Stanley Love and Rex Walheim (bottom), both STS-122 mission specialists, work in the Quest Airlock of the International Space Station while Space Shuttle Atlantis is docked with the station.
JSC2011-E-060424 (30 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA
S122-E-007162 (9 Feb. 2008) --- Astronauts Steve Frick (left) and Rex Walheim, STS-122 commander and mission specialist, respectively, take a moment for a photo on the aft flight deck of Space Shuttle Atlantis during flight day three activities.
S135-E-007117 (10 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured at a control panel on the aft flight deck of the space shuttle Atlantis during rendezvous and docking operations with the International Space Station. Photo credit: NASA
JSC2011-E-060422 (30 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA
JSC2010-E-084214 (17 May 2010) --- NASA astronauts Rex Walheim (left) and Steve Swanson, spacecraft communicators (CAPCOM) for the STS-132 mission, are pictured in the space station flight control room in the Mission Control Center at NASA's Johnson Space Center during flight day four activities.
S122-E-006222 (8 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, is pictured between two Extravehicular Mobility Unit (EMU) spacesuits on the middeck of Space Shuttle Atlantis during flight day two activities.
S135-E-010689 (19 July 2011) --- NASA astronauts Doug Hurley (left), pilot for the STS-135 mission and Rex Walheim, mission specialist, are pictured on the flight deck of the space shuttle Atlantis prior to undocking/ separation from the International Space Station. Photo credit: NASA
S135-E-010699 (19 July 2011) --- NASA astronauts Doug Hurley (left), pilot for the STS-135 mission and Rex Walheim, mission specialist, are pictured on the flight deck of the space shuttle Atlantis prior to undocking/ separation from the International Space Station. Photo credit: NASA
S135-E-006277 (9 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured on the middeck of the space shuttle Atlantis during the mission's second day of activities in Earth orbit. Photo credit: NASA
JSC2011-E-060450 (30 June 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, responds to a question from a reporter during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA